[#199] putsvc: Refactor placement iterator

Resolve funlen linter for iteratePlacement method

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/services/object/put/distributed.go

@@ -164,7 +164,6 @@ func (t *distributedTarget) sendObject(node nodeDesc) error {
 	return nil
 }
 
-// nolint: funlen
 func (t *distributedTarget) iteratePlacement(f func(nodeDesc) error) (*transformer.AccessIdentifiers, error) {
 	id, _ := t.obj.ID()
 
@@ -175,72 +174,22 @@ func (t *distributedTarget) iteratePlacement(f func(nodeDesc) error) (*transform
 		return nil, fmt.Errorf("(%T) could not create object placement traverser: %w", t, err)
 	}
 
-	var resErr atomic.Value
+	resErr := &atomic.Value{}
 
-loop:
 	for {
 		addrs := traverser.Next()
 		if len(addrs) == 0 {
 			break
 		}
 
-		wg := new(sync.WaitGroup)
-
-		for i := range addrs {
-			if t.traversal.processed(addrs[i]) {
-				// it can happen only during additional container broadcast
-				continue
-			}
-
-			wg.Add(1)
-
-			addr := addrs[i]
-
-			isLocal := t.isLocalKey(addr.PublicKey())
-
-			var workerPool util.WorkerPool
-
-			if isLocal {
-				workerPool = t.localPool
-			} else {
-				workerPool = t.remotePool
-			}
-
-			if err := workerPool.Submit(func() {
-				defer wg.Done()
-
-				err := f(nodeDesc{local: isLocal, info: addr})
-
-				// mark the container node as processed in order to exclude it
-				// in subsequent container broadcast. Note that we don't
-				// process this node during broadcast if primary placement
-				// on it failed.
-				t.traversal.submitProcessed(addr)
-
-				if err != nil {
-					resErr.Store(err)
-					svcutil.LogServiceError(t.log, "PUT", addr.Addresses(), err)
-					return
-				}
-
-				traverser.SubmitSuccess()
-			}); err != nil {
-				wg.Done()
-
-				svcutil.LogWorkerPoolError(t.log, "PUT", err)
-
-				break loop
-			}
+		if t.iterateAddresses(traverser, addrs, f, resErr) {
+			break
 		}
-
-		wg.Wait()
 	}
 
 	if !traverser.Success() {
 		var err errIncompletePut
-
 		err.singleErr, _ = resErr.Load().(error)
-
 		return nil, err
 	}
 
@@ -248,10 +197,7 @@ loop:
 	if t.traversal.submitPrimaryPlacementFinish() {
 		_, err = t.iteratePlacement(f)
 		if err != nil {
-			t.log.Error("additional container broadcast failure",
-				zap.Error(err),
-			)
-
+			t.log.Error("additional container broadcast failure", zap.Error(err))
 			// we don't fail primary operation because of broadcast failure
 		}
 	}
@@ -261,3 +207,52 @@ loop:
 	return new(transformer.AccessIdentifiers).
 		WithSelfID(id), nil
 }
+
+func (t *distributedTarget) iterateAddresses(traverser *placement.Traverser, addrs []placement.Node, f func(nodeDesc) error, resErr *atomic.Value) bool {
+	wg := &sync.WaitGroup{}
+
+	for i := range addrs {
+		if t.traversal.processed(addrs[i]) {
+			// it can happen only during additional container broadcast
+			continue
+		}
+
+		wg.Add(1)
+
+		addr := addrs[i]
+		isLocal := t.isLocalKey(addr.PublicKey())
+
+		workerPool := t.remotePool
+		if isLocal {
+			workerPool = t.localPool
+		}
+
+		if err := workerPool.Submit(func() {
+			defer wg.Done()
+
+			err := f(nodeDesc{local: isLocal, info: addr})
+
+			// mark the container node as processed in order to exclude it
+			// in subsequent container broadcast. Note that we don't
+			// process this node during broadcast if primary placement
+			// on it failed.
+			t.traversal.submitProcessed(addr)
+
+			if err != nil {
+				resErr.Store(err)
+				svcutil.LogServiceError(t.log, "PUT", addr.Addresses(), err)
+				return
+			}
+
+			traverser.SubmitSuccess()
+		}); err != nil {
+			wg.Done()
+			svcutil.LogWorkerPoolError(t.log, "PUT", err)
+			return true
+		}
+	}
+
+	wg.Wait()
+
+	return false
+}